No bottom, just a circle of wire.
Here are photos of the three, four and five sections by height. They are all 24 1/2 sections in circumference. I know that is small for large plants, but by the time they get that large the plants don't seem to require protection.
The cages are not around the specific plants they will actually be placed around yet. I will rearrange them according to the height of the scapes. Often some of the taller plants need a little support anyhow and I think these should aid in that also. I want to try and do a better job of sizing the cage to the plant so that when I take photos the cage will not have to be moved when photographing the blooms. Of course I know Tiger Kitten is very short so I did intentionally place a short cage over it. The cages are about 15 inches in diameter.
I have had some older cages I made form salvaged wire a good while now and they have done a great job of protecting the daylilies, some of them could have used a wider cage because some of the outer roots were exposed outside of the cage and were dug up, but I can't tell it has actually affected the health of the plants any.
You probably can't tell by the photos, but sometimes you end up with half sections on both ends, when that happens the "Tangs" or sharp ends fold over easily enough, and I try to fold them so they add support to the top wire, it could be folded one or two ways but you will see one is better than the other, because of how the wire is welded.
After I got the hang of doing this, all I needed was a pair of leather gloves to bend the wire, but I used pliers when I first got started. I used tin snips to actually cut the wire with, it is a two handed job. If you don't have strong hands bolt cutters might work easier.
I got much more efficient as I made a few.
One thing I did was to cut a cage from the top, then cut the next cage from the bottom, then the rest out of the middle, that makes for smooth edges of the first two, then the middle cages need the wires folded down on one end.